焊線參數(shù)最佳化專題研究-資料下載頁
2025-01-09 22:00本頁面
【正文】 =t(1) =* =B1B2B3B1B2B3(),表示B2與B3相互差異不顯著,但BALL SHEAR CPK特性值愈大愈好,所以選取B2與B3 : A:B’g FORCE 60~100 B:US POWER 100~120 D:SEARCH FORCE 60~100 H:SEARCH SPEED 12~14 十五、第三階段再現(xiàn)性實驗 實驗條件: 因子代號參數(shù)范圍B39。g FORCEAA1~A3US POWERBB2~B3US TIMECC1~C2SEARCH FORCEDD1~D3溫度FF1~F2SEARCH HEIGHTGG1~G2SEARCH SPEEDHH2~H3PRE TIMEI0CHANGE TIMEJ0CHANGE DELAYK0 實驗結(jié)果 AvgσCpk后測不良率(ppm)實驗前2805實驗后58 十六、檢定統(tǒng)計 SHEAR TwoSample Analysis Results Sample Statistics:Numbrer of Obs. Average Variance Std. Deviation Median 1155 81 1155 81Pooled 2310 81Difference between Means= Conf. Interval For Diff. in Means: (Equal Vars.) Sample 1Sample 2 (Unequal Vars.) Sample 1Sample 295 Percent 2308 . .Ratio of Variances= Conf. Interval for Ratio of Variances: 0 Percent Sample 1 v Sample 2Hypothesis Test for H0:Diff=0 vs Alt:NE at Alpha = Computed t statistic = Sig. Level = so reject H0. SHEAR CPK TwoSample Analysis Results Sample Statistics:Numbrer of Obs. Average Variance Std. Deviation Median 15 15 Pooled 30 Difference between Means= Conf. Interval For Diff. in Means: (Equal Vars.) Sample 1Sample 2 (Unequal Vars.) Sample 1Sample 295 Percent 28 . .Ratio of Variances= Conf. Interval for Ratio of Variances: 0 Percent Sample 1 v Sample 2Hypothesis Test for H0:Diff=0 vs Alt:NE at Alpha = Computed t statistic = Sig. Level = so reject H0. 十七、結(jié)論： 由再現(xiàn)性結(jié)果判斷第二階段所求得之參數(shù)最佳組合,不良率由2083ppm降至58ppm,并提供現(xiàn)場人員有效之作業(yè)準則. 此實驗雖未將ball shear平均值明顯提升,但由于cpk之提升造成后測不良率大幅降低,故ball shear之特性質(zhì)雖屬望大值,但是否可無止境的望大,將是值得探討. 第 21 頁 共 21 頁
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